Quartz caps for making opal doublets - over 200 of them! T is probably closer to 250 of them!I bought out the estate of a long time stone collector and I am putting all of the items up for bid. I am unable to identify at least 30% of the slabs and stones in the collection. If you can identify any of the stones, in any listing I put up, I would appreciate the assistance to help ensure I correctly post items! Check out our other great auctions to save on shipping and be sure to add us to your favorites list! If you don't see what you want, please ask as we just might have it. Please email me if you have any concerns or questions BEFORE BIDDING as I intend to have 100% satisfaction in my sales. Insurance will be offered with the invoice for the full purchase price plus shipping. Thank You.